NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

5 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, last 30 days — NPA 585
EXIANT COMMUNICATIONS LLC 3
TC SYSTEMS, INC. - NY 1
NEW CINGULAR WIRELESS PCS, LLC - DC 1
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2014-11-03 585-483-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 BATAVIA NY
2014-10-30 585-900-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K CHAFFEE NY
2014-10-21 585-434-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K ROCHESTER NY
2014-10-21 585-434-1XXX 1000–1999Assigned TWC IP ENABLED SERVICES, LLC 793K ROCHESTER NY
2014-10-21 585-434-2XXX 2000–2999Assigned TWC IP ENABLED SERVICES, LLC 793K ROCHESTER NY
2014-10-14 585-416-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WATERPORT NY
2014-10-10 585-656-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ATTICA NY
2014-10-07 585-358-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HENRIETTA NY
2014-10-07 585-358-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HENRIETTA NY
2014-10-07 585-364-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FAIRPORT NY
2014-10-07 585-364-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 FAIRPORT NY
2014-10-01 585-628-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BELFAST NY
2014-10-01 585-635-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 EROCHESTER NY
2014-10-01 585-635-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 EROCHESTER NY
2014-10-01 585-635-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 EROCHESTER NY
2014-09-30 585-449-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BELMONT NY
2014-09-30 585-558-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WARSAW NY
2014-09-30 585-623-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 ROCHESTER NY
2014-09-30 585-623-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 ROCHESTER NY
2014-09-26 585-634-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J RUSHVILLE NY
2014-09-25 585-378-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 OLEAN NY
2014-09-25 585-623-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2014-09-25 585-623-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2014-09-25 585-623-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROCHESTER NY
2014-09-24 585-280-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 WEBSTER NY
2014-09-18 585-491-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2014-09-10 585-299-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E CHURCHVL NY
2014-09-10 585-357-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - NY 997E ALBION NY
2014-09-09 585-491-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2014-09-09 585-491-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2014-09-09 585-491-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2014-09-09 585-491-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2014-09-09 585-491-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2014-09-05 585-363-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K ROCHESTER NY
2014-09-05 585-363-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ROCHESTER NY
2014-09-05 585-483-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS, INC. - NY 6622 BATAVIA NY
2014-09-05 585-483-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BATAVIA NY
2014-09-05 585-623-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K ROCHESTER NY
2014-09-03 585-229-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - NY 4006 HONEOYE NY
2014-09-03 585-252-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PAVILION NY
2014-09-03 585-257-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HOLCOMB NY
2014-09-03 585-280-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WEBSTER NY
2014-09-03 585-308-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LE ROY NY
2014-09-03 585-358-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HENRIETTA NY
2014-09-03 585-366-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HILTON NY
2014-09-03 585-367-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HEMLOCK NY
2014-09-03 585-382-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LEICESTER NY
2014-09-03 585-384-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J COHOCTON NY
2014-09-03 585-431-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BROCKPORT NY
2014-09-03 585-432-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J DANSVILLE NY

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.